Overview
Overview
PMSM-based EMB Control and Monitoring for Railway Vehicles
Conventional pneumatic brakes use compressors, tanks, and pipes, consuming under-floor space.
Complex air lines and valves increase inspection and maintenance workload.
Pneumatic actuators limit precise brake force control and real-time status visibility.
PMSM-based EMB with inverter reduces system size and enables high-response, precise brake control.
Real-time EMB monitoring and diagnostics enable condition-based maintenance and lower life-cycle cost.
Core Competencies
Purpose
PMSM-based EMB control and monitoring technology replaces pneumatic brake actuators and enables precise, reliable brake force control.
PMSM torque, speed, and position control ensure fast brake application and stable clamp force for the EMB actuator.
Closed-loop PMSM control with sensor feedback enables real-time brake status monitoring and fault diagnosis.
A dedicated inverter with ring communication provides bypass control and load sharing among multiple EMB units.
EMB caliper and inverter meet type-approval component criteria and have completed combined dynamometer performance tests.
Expected Benefits
Condition-Based Maintenance
– Real-time brake monitoring and data acquisition enable CBM-based preventive maintenance.
Simplified Maintenance
– Removal of complex pneumatic lines and components simplifies the brake system structure.
Cost & Management Savings
– Fewer pneumatic parts and simpler maintenance reduce maintenance and management costs.
Airless Train Application
– Applicable to urban, conventional, and high-speed trains, reducing pneumatic parts and overall life-cycle cost.
Certifications
Brake component tests per railway type-approval criteria (EMB caliper, inverter)
Combined caliper–inverter performance verification on dynamometer test bench
TRL 7
Progressed to the commercialization stage
Contact
Korea Railroad Research Institute (KRRI)
Global Business Department
Dr. Seungkoo Baek
E-mail: skbaek@krri.re.kr